This TerraTrike Maverick has been converted to an electric assist with an eBike Kit specially designed for trikes.  Its maximum speed is 20 miles per hour.  Also added is a Patterson Metropolis 3-speed front crankset.  With the 8-speed rear derailleur, this makes a wide range of 24 speeds.  This unit experienced a crash, but it runs smoothly and straight with no pulling to either the left or right.  This is a good unit for a basic, easy to use, electric trike!